Tractor drawn disk plow



June 9, 1931. F. G. HARRIS 1,809,694

TRACTOR DRAWN DI SK PLOW Filed Aug. 22. 1929 Patented June 9, 1931 V UNITED STATES FREDERICK GAINFORD HARRIS, or MOUNT BAUBLE, -QITEENSLANI),.AUSIBALIA TRACTOR nnAwn isk rLow' Application filed August 22, 1929, Serial No.

This invention relates to a tractor drawn disk plow and to means for attaching same to a tractor. The object of this invention is to provide a plow of simple, strong and efiicient con struction for attachment to the rear of a tractor; said plow having a framework rigidly secured adjacent to the rear Wheels; the disks mounted upon the said framework having a spring controlled radial movement adapted to absorb sudden shocks when obstructions are encountered.

The invention also contemplates the provision of means for raising and lowering the said disks, and compensation for the weight of the disks, enabling the combined tractor and plow to be easily and conveniently handled by one man.

In'the specification reference Will be had 29 to the attached sheet'of drawings wherein like numerals in the different, figures denote the same parts, and wherein- Figure 1 is a plan of the rearportion of a tractor to which is attached the apparatus if for carrying and supporting the disks.

Figure 2 is a detail side viewshowing the quadrant for raising and lowering the disks. Figure 3 is a detail side view of the lever pull rod, and spring, whereby the lift 15 directly applied to thebar framework carrying the disks.

Figure 4C is a detail View of the bracket which is bolted to the framework and to which the lifting rod is directly connected.

The invention has been shown in the drawings applied to a Well known tractor, but Will be modified slightly insofar as" the clips and brackets upon the differential housing or tractor framework are concerned. The

paratus will however be capable of standard production for various tractors. The framework may be quickly and easily aflixed to and removed from the tractor.

Referring to Figure 1 the rear portion of a tractor is shown and includes wheels 1 and differential housing 2. Connected to the differential housing 2 is a bracket 3 which can n ries at its other end another bracket 4, the latter being fastened near its centre.

* main framework, lifting and supporting ap- 387,720, and in Australia January 21, 1929.

This bracket-4' is further strengthened by a brace *5 which atone end is clipped by a clip 6 over the diiferential housing 2. The other .end* ofrth'is brace .5 {l8 connected :to the bracket 4, at apoint where the bracket 3 is secured. i

The bracket 'tis bolted tokone :sideof the differential =casing2 by means of a bracket 7., the otherend 8 of this bracket l' forming asupport for the :bar 9.

Another brace 10 is connected to the idife ferentialrhousing2 at a point l'l'and'to the bracket -vat a :point :8 where it supports the bar 9. This bar 9 is fastened at .a point 13 by bolt .12 passing through the beforemen tioned bracket tat therear of the differential housing 2.

Hinged-on bar .9 at points i l and 15 is -:a .bar framework 1 6. which carries the disk cutters 17. Twospringswl8 are attached "to this bar framework 16 and also to the lug-19 branchingoff-the support '10.

The bracket 20' (see Figure 4) is 'boltedto thei'bar framework 16 .andthrough a -hole-in 75 this bracket '20 an eye-bolt121 (see Figure? is secured. This-feye/bolt '21 passes through ajaw 22 .atthe end of lever 24. The eye-bolt 2'1 passes 1 through a spring 25 the tension of which is adjusted bymeans of a nut '23. Le- 9 ver '24s is connectedto a square shaft' 26 which hinges in bearings 2'7 and 28 on brackets 29 and 30: The brackets' 29 and ISO Jaresecured to thedifierential housing 2, in the case o'f bracket 30 by means of a clip 31. e V

Attached to shaft-26 E aharidleve'r 32 :carrying on it a rod 33 and pawl 34 (see Figure 2) which engages notches 35 in the quadrant on bracket 3 7 When plowing is-to be commenced, the 90 disks 17 are adjusted to the desired depth by the hand lever 32, which partially rotates the shaft 26 which in turn raises or lowers the lever 24 and disks 17 carried by U frame 16 r which is hinged to the framework rigidly attached to the tractor. Upon an obstruction being met by the disks they rise against the spring 25 which absorbs the shock the U frame 16 carrying the disks 17 artially rotat ing on the shaft 9 which is rigid. Whilst the T199 driver is lifting the disks 17 he is assisted by the springs 18 which compensate for the weight of the disks 17.

It will be obvious that the disks 17 being as close as possible to the tractor wheels, and rigidly secured to the tractor and following it, there is not the tendenc for them to interfere with the steering o the tractor; and furthermore the weight of the tractor is ractically upon them allowing a deeper and etter cut. It will also be understood that by means of the lever 32 the disks may be raised clear of the ground when the plow is being transported.

A plow constructed in accordance with this invention, and drawn by a tractor, will bury rubbish and perform hillside work, either throwing up or down owing to its being rigidly attached to the tractor which it must follow and by which it is controlled.

I claim 1. A plow attachment for tractors, comprising a frame adapted to be secured to the differential housing of a tractor and to extend rearwardly therefrom, a bar secured to said frame and extending rearwardly therefrom and diagonally with respect to the axis of the tractor, a low carrier frame pivotally connected to sai bar and extending laterally therefrom, brackets adapted to be secured to the differential housing on the side opposite the first named frame, and a lever having a shaft mounted in bearings, with which said brackets are provided, and also having an arm connected to said plow carrier frame, said lever serving to raise and lower the plow carrier frame.

2. An attachment as claimed in claim 1, including also a connecting spring between the first named frame and the plow carrier frame and tending to lift the latter.

3. An attachment as claimed in claim 1, in which the connection between the lever arm and the plow carrier frame is a bolt extending through and movable in the direction of its length with respect to the arm, a spring on said bolt and bearing between a stop member on the bolt and the arm and an adjusting nut on said bolt bearing on the upper side 0 of said arm.

FREDERICK GAINFORD HARRIS. 

